/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | foam-extend: Open Source CFD
   \\    /   O peration     | Version:     4.1
    \\  /    A nd           | Web:         http://www.foam-extend.org
     \\/     M anipulation  | For copyright notice see file Copyright
-------------------------------------------------------------------------------
License
	This file is part of foam-extend.

	foam-extend is free software: you can redistribute it and/or modify it
	under the terms of the GNU General Public License as published by the
	Free Software Foundation, either version 3 of the License, or (at your
	option) any later version.

	foam-extend is distributed in the hope that it will be useful, but
	WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
	General Public License for more details.

	You should have received a copy of the GNU General Public License
	along with foam-extend.  If not, see <http://www.gnu.org/licenses/>.

\*---------------------------------------------------------------------------*/

#include "BlockLduPrecon.H"
#include "blockNoPrecons.H"

template<class Type>
class BlockNoPrecon;

// * * * * * * * * * * * * * * * * Selectors * * * * * * * * * * * * * * * * //

template<class Type>
Foam::autoPtr<Foam::BlockLduPrecon<Type> > Foam::BlockLduPrecon<Type>::New
(
	const BlockLduMatrix<Type>& matrix,
	const dictionary& dict,
	const word keyword
)
{
	word preconName;

	// Handle primitive or dictionary entry
	const entry& e = dict.lookupEntry(keyword, false, false);
	if (e.isDict())
	{
		e.dict().lookup(keyword) >> preconName;
	}
	else
	{
		e.stream() >> preconName;
	}

	const dictionary& controls = e.isDict() ? e.dict() : dictionary::null;

	if (matrix.diagonal())
	{
		// No preconditioning for the diagonal matrix
		return autoPtr<BlockLduPrecon<Type> >
		(
			new BlockNoPrecon<Type>
			(
				matrix,
				controls
			)
		);
	}
	else
	{
		typename dictionaryConstructorTable::iterator constructorIter =
			dictionaryConstructorTablePtr_->find(preconName);

		if (constructorIter == dictionaryConstructorTablePtr_->end())
		{
			FatalIOErrorIn
			(
				"autoPtr<BlockLduPrecon> BlockLduPrecon::New\n"
				"(\n"
				"    const BlockLduMatrix<Type>& matrix,\n"
				"    const dictionary& dict\n"
				")",
				dict
			)   << "Unknown matrix preconditioner " << preconName
				<< endl << endl
				<< "Valid matrix preconditioners are :" << endl
				<< dictionaryConstructorTablePtr_->sortedToc()
				<< exit(FatalIOError);
		}

		return autoPtr<BlockLduPrecon<Type> >
		(
			constructorIter()
			(
				matrix,
				controls
			)
		);
	}
}


// ************************************************************************* //
